Impurity of Terumah

Please note that the term, "Terumah," refers to a tithe which is removed from produce. It is measured at 1/40 to 1/60 of the produce. A "Tevul Yom" is a person who has immersed, and is going to become pure when the sun sets.

Checking for menstrual blood before eating sanctified foods [Terumah, Temple Offerings]: Niddah 11a, 11b, 16b
Requiring the husband to check himself for blood after sexual relations which may have come from her, if she is [not] going to consume sanctified foods [Terumah, Temple Offerings]: Niddah 11b
Responsibility to prevent Terumah from becoming eligible to receive impurity: Succah 35b
Responsibility to protect Terumah which is possibly impure already, from impurity: Pesachim 15a, 20b
The textual source forbidding a person from making Terumah impure: Makkot 14b
What to do if one senses the beginning of seminal emission while consuming Terumah: Niddah 13a
Protecting the Terumah from Natural impurity, with a Method which may cause it to become impure anyway, through his Active Participation: Pesachim 21a
Causing impurity actively, vs. Allowing it to happen naturally: Pesachim 15a, 20b; Menachot 48a-b
Actively making Terumah impure, where it is going to be destroyed anyway [by falling into impure non-Terumah]: Pesachim 15a, 20b-21a; Menachot 48a-b
Actively making Terumah impure, where the alternative is the Waste of non-Terumah: Pesachim 15b, 20b-21a; Menachot 48a-b
Above case, distinguishing between levels of Loss: Pesachim 15b, 20b
Textual source prohibiting consumption of Terumah while one is impure: Makkot 14b

Communication of Impurity

Using "Seeding" of an impure item in a mixture to remove Impurity from Terumah: Pesachim 34b-35a
Terumah becomes invalid from impurity as a result of contact with a Tevul Yom: Shabbat 100a; Eruvin 71b; Pesachim 14b, 44a; Niddah 7b
Communication of impurity from one solid food to another: Pesachim 14a
An item with the Third Descendant Level of impurity makes Terumah invalid: Pesachim 18b
There is no Fourth Descendant Level of impurity for Terumah: Pesachim 19a
A Vessel combines all Temple Offerings contained in it, but not Terumah, for all to become impure if one of them becomes impure: Pesachim 19a
A mixture where the minority is Terumah: Pesachim 44a
A mixture where the majority is Terumah: Pesachim 44a
Sprouts from impure Terumah, and their Sprouts; differentiating in cases where the initial seeds survive or don't: Pesachim 34a
Allowing the crushing of Berries in bunches smaller than a An Egg [Beitzah] Size to prevent communication of impurity to the juice: Pesachim 33b, 34b
Impurity communicated if a Tevul Yom touches oil of Terumah which is floating atop wine of Terumah: Shabbat 100a; Eruvin 71b

If a Barrel of Terumah is of uncertain impurity, do we leave it in a place where it will certainly become impure, or whether we still have a requirement to prevent it from becoming [fully] impure: Pesachim 15a, 20bEliyahu the Prophet revealing status of Terumah which is of uncertain Purity: Pesachim 13a, 34aImpurity of Terumah which was touched by a woman shortly before she discovered menstrual blood: Niddah 6a-bDestroying Terumah, where the majority of cases would be impure but there is a previous, verified status of purity: Niddah 18b